First you have to notice that the contact at A is a roll support, so the reaction force there is perpendicular to the surface. Therefore Fa has 60 degree against horizontal axis. When you draw free body diagram, decompose the Fa reaction force into its horizontal and vertical components:
Fax = Fa Cos60
Fay = Fa Sin60
Then you solve the balance equations of X-axis, Y-axis, and Moments. I would start from the sum of Moments at C equal zero. You will get the value of Fa.
Then with the balance equations of X-axis and Y-axis with Fa already known you will get the value of Fcx and Fcy.
I get a slightly different result, probably due to rounding:
Fa = 365.24 N
Fcx = 782.62 N
Fcy = 316.3 N